Catching Andromeda`s Light
... The Earth moves fast around the Sun. But if the Sun had much more mass than it does, the Earth would move much faster. So the very high speed of the stars and gas near Andromeda’s center means there must be so much mass that it’s a black hole! Astronomers calculate that Andromeda’s central black hol ...
... The Earth moves fast around the Sun. But if the Sun had much more mass than it does, the Earth would move much faster. So the very high speed of the stars and gas near Andromeda’s center means there must be so much mass that it’s a black hole! Astronomers calculate that Andromeda’s central black hol ...
Stefan-Boltzmann Law Problems
... 6. A star is five times as luminous as the Sun and has a surface temperature of 98,000 K. What is its radius, compared to that of the Sun? Again, this is a Stefan-Boltzmann problem (luminosity, radius and temperature) that will be most easily solved using a ratio approach. See the first problem to r ...
... 6. A star is five times as luminous as the Sun and has a surface temperature of 98,000 K. What is its radius, compared to that of the Sun? Again, this is a Stefan-Boltzmann problem (luminosity, radius and temperature) that will be most easily solved using a ratio approach. See the first problem to r ...
File - YEAR 11 EBSS PHYSICS DETAILED STUDIES
... 1 parsec is the distance to a star that would show 1 arcsec of parallax. (206 265 AU) ...
... 1 parsec is the distance to a star that would show 1 arcsec of parallax. (206 265 AU) ...
Pretty Pictures of the Cosmos
... visible with good binoculars towards the constellation of Sagittarius. The energetic processes of star formation create not only the colors but the chaos. ...
... visible with good binoculars towards the constellation of Sagittarius. The energetic processes of star formation create not only the colors but the chaos. ...
Packet 3
... 7. Stars that are closer than 32.6 light-years away appear __________________________. Therefore those stars that are further than 32.6 light-years away appear ________________________. 8. How far away a star would be if it’s apparent magnitude and absolute magnitude were equal? _________ Match the ...
... 7. Stars that are closer than 32.6 light-years away appear __________________________. Therefore those stars that are further than 32.6 light-years away appear ________________________. 8. How far away a star would be if it’s apparent magnitude and absolute magnitude were equal? _________ Match the ...
Luminosity Classes
... These are called Variable Stars. The change in luminosity is due to a change in size. (Though temperature changes too.) ...
... These are called Variable Stars. The change in luminosity is due to a change in size. (Though temperature changes too.) ...
NORTH SOUTH EAST WEST
... The interior planets Mercury and Venus don’t have oppositions from the sun but rather they have what is called an elongation. This means they are at their farthest distance from the sun in the sky from our perspective on Earth making it the best time to look for these two planets. Both planets are f ...
... The interior planets Mercury and Venus don’t have oppositions from the sun but rather they have what is called an elongation. This means they are at their farthest distance from the sun in the sky from our perspective on Earth making it the best time to look for these two planets. Both planets are f ...
globular cluster - Harding University
... last picture is known, has been visible to observers from ancient times. • The nature of the milky way, however, way was not know until Galileo began to make observations with his telescope. He observed that the Milky Way was a large collection of stars concentrated in a certain region of the sky. • ...
... last picture is known, has been visible to observers from ancient times. • The nature of the milky way, however, way was not know until Galileo began to make observations with his telescope. He observed that the Milky Way was a large collection of stars concentrated in a certain region of the sky. • ...
Today: Magnitude Terminology Photometry Applications Reading
... Calibrated Magnitude: physically meaningful brightness of a star calibrated relative to the known flux standard (e.g. Vega); typically obtained by calculating differential magnitude w.r.t. a known standard star. ...
... Calibrated Magnitude: physically meaningful brightness of a star calibrated relative to the known flux standard (e.g. Vega); typically obtained by calculating differential magnitude w.r.t. a known standard star. ...
D109-08x
... In Cycle 17 of HST we request a small amount of time to obtain high resolution imaging of this collection of knots in as many filters as practical. Having a better photometric characterization of the knots over a broader color baseline than obtainable from the ground coupled with higher resolution i ...
... In Cycle 17 of HST we request a small amount of time to obtain high resolution imaging of this collection of knots in as many filters as practical. Having a better photometric characterization of the knots over a broader color baseline than obtainable from the ground coupled with higher resolution i ...
Galaxies - Indiana University Astronomy
... Using the same website as above, click on “spectrum” for the two galaxies whose distances you measured. The optical spectrum of the galaxy is shown at the top of the spectrum page. Shown are many different spectral features, including absorption lines and emission lines, superimposed on continuum em ...
... Using the same website as above, click on “spectrum” for the two galaxies whose distances you measured. The optical spectrum of the galaxy is shown at the top of the spectrum page. Shown are many different spectral features, including absorption lines and emission lines, superimposed on continuum em ...
Galaxies - Wallkill Valley Regional High School
... 1-3 dwarf planetoids a few hundred natural satellites (moons) gases, asteroids, dust, etc. Well, Guess What? Our solar system is only one of billions of star systems that make up the Milky Way Galaxy, which is only one of several dozen galaxies that makes up our Local Cluster, and our Local Cluster ...
... 1-3 dwarf planetoids a few hundred natural satellites (moons) gases, asteroids, dust, etc. Well, Guess What? Our solar system is only one of billions of star systems that make up the Milky Way Galaxy, which is only one of several dozen galaxies that makes up our Local Cluster, and our Local Cluster ...
The Night Sky This Month - Usk Astronomical Society
... The Moon is at apogee (most distant from Earth) on the 18th and at perigee (nearest Earth) on the 6th, at around the time of the new Moon. A syzygy is when three interacting celestial bodies form a straight line, and is used to define either of the two positions (conjunction or opposition) of a cel ...
... The Moon is at apogee (most distant from Earth) on the 18th and at perigee (nearest Earth) on the 6th, at around the time of the new Moon. A syzygy is when three interacting celestial bodies form a straight line, and is used to define either of the two positions (conjunction or opposition) of a cel ...
star - TeacherWeb
... Steady State Theory. This theory stated that the universe was always the same. Astronomers believe that the expanding universe is the result of an enormous explosion known as the big bang. The explosion occurred 15-20 billion years ago. As the matter moved away from the explosion, gravity caused clu ...
... Steady State Theory. This theory stated that the universe was always the same. Astronomers believe that the expanding universe is the result of an enormous explosion known as the big bang. The explosion occurred 15-20 billion years ago. As the matter moved away from the explosion, gravity caused clu ...
Physics 1025: Lecture 17 Sun (cont.), Stellar Distances, Parallax
... the leading poles has switched. Hence the true period is 22 years for a complete sunspot cycle to repeat itself. There is also an overall modulation of the peak sizes themselves, the e.g. during the 1600’s there was a period of practically no sun spots at all, the Maunder minimum, associated with th ...
... the leading poles has switched. Hence the true period is 22 years for a complete sunspot cycle to repeat itself. There is also an overall modulation of the peak sizes themselves, the e.g. during the 1600’s there was a period of practically no sun spots at all, the Maunder minimum, associated with th ...
Final Exam Review
... to the same position with respect to the stars. 2. the time it takes to orbit once around Earth, back to the same lunar phase. 3. the time it takes to orbit once around the sun. 4. the time it takes to orbit once around a glass of ...
... to the same position with respect to the stars. 2. the time it takes to orbit once around Earth, back to the same lunar phase. 3. the time it takes to orbit once around the sun. 4. the time it takes to orbit once around a glass of ...
AST 207 7 Homew
... uminosity of a star , where T is its temperaature and R iss its radius. Abs. mag. Diistance (pc) Appp. Mag. A ...
... uminosity of a star , where T is its temperaature and R iss its radius. Abs. mag. Diistance (pc) Appp. Mag. A ...
PHS 111 Test 3 Review Chapters 26-28
... The core of the Moon is: solid. liquid. gaseous. Not enough information is known for an answer. The Earth rotates about its axis once per 24 hours, while the Moon rotates about its axis once per: 24 hours also. half month. month. year. none of these When the Moon assumes its characteristic thin cres ...
... The core of the Moon is: solid. liquid. gaseous. Not enough information is known for an answer. The Earth rotates about its axis once per 24 hours, while the Moon rotates about its axis once per: 24 hours also. half month. month. year. none of these When the Moon assumes its characteristic thin cres ...
Evolution of a Protostar
... Luminosity remains nearly constant during late stages of contraction, while radiation transports energy through star. ...
... Luminosity remains nearly constant during late stages of contraction, while radiation transports energy through star. ...
PHS 111 Test 3 Review Chapters 26-28
... The core of the Moon is: solid. liquid. gaseous. Not enough information is known for an answer. The Earth rotates about its axis once per 24 hours, while the Moon rotates about its axis once per: 24 hours also. half month. month. year. none of these When the Moon assumes its characteristic thin cres ...
... The core of the Moon is: solid. liquid. gaseous. Not enough information is known for an answer. The Earth rotates about its axis once per 24 hours, while the Moon rotates about its axis once per: 24 hours also. half month. month. year. none of these When the Moon assumes its characteristic thin cres ...
Perseus (constellation)
Perseus, named after the Greek mythological hero Perseus, is a constellation in the northern sky. It was one of 48 listed by the 2nd-century astronomer Ptolemy and among the 88 modern constellations defined by the International Astronomical Union (IAU). It is located in the northern celestial hemisphere near several other constellations named after legends surrounding Perseus, including Andromeda to the west and Cassiopeia to the north. Perseus is also bordered by Aries and Taurus to the south, Auriga to the east, Camelopardalis to the north, and Triangulum to the west.The galactic plane of the Milky Way passes through Perseus but is mostly obscured by molecular clouds. The constellation's brightest star is the yellow-white supergiant Alpha Persei (also called Mirfak), which shines at magnitude 1.79. It and many of the surrounding stars are members of an open cluster known as the Alpha Persei Cluster. The best-known star, however, is Algol (Beta Persei), linked with ominous legends because of its variability, which is noticeable to the naked eye. Rather than being an intrinsically variable star, it is an eclipsing binary. Other notable star systems in Perseus include X Persei, a binary system containing a neutron star, and GK Persei, a nova that peaked at magnitude 0.2 in 1901. The Double Cluster, comprising two open clusters quite near each other in the sky, was known to the ancient Chinese. The constellation gives its name to the Perseus Cluster (Abell 426), a massive galaxy cluster located 250 million light-years from Earth. It hosts the radiant of the annual Perseids meteor shower—one of the most prominent meteor showers in the sky.